<template>
	<div class="list" ref="wrapper">
		<div>
			<div class="area">
				<div class="title border-topbottom">当前城市</div>
				<div class="botton-list">
					<div class="button-wrapper">
						<div class="button">{{this.city}}</div>
					</div>
				</div>
			</div>
			<div class="area">
				<div class="title border-topbottom">热门城市</div>
				<div class="botton-list">
					<div class="button-wrapper" 
						v-for="item of hot"
						:key="item.id"
						@click="handleCityClick(item.name)"
					>
						<div class="button">{{item.name}}</div>
					</div>
					
				</div>
			</div>
			<div class="area" 
				v-for="(item,key) of cities" 
				:key="key"
				:ref="key"
			>
				<div class="title border-topbottom">{{key}}</div>
				<div class="item-list">
					<div class="item border-bottom"
						v-for="innerItem of item" :key="innerItem.id"
						@click="handleCityClick(innerItem.name)"
					>
						{{innerItem.name}}
					</div>
				</div>
			</div>
			
		</div>
	</div>
</template>

<script>
	import Bscroll from 'better-scroll'
	import {mapState,mapMutations} from 'vuex'  //引入vuex处理$store
	export default {
		name: 'CityList',
		props:{
			hot:Array,
			cities:Object,
			letter:String,
		},
		mounted(){
			this.scroll=new Bscroll(this.$refs.wrapper)
		},
		watch:{
			letter(){
				if(this.letter){
					const element=this.$refs[this.letter][0]
					this.scroll.scrollToElement(element)
				}
				console.log(this.letter)
			}
		},
		methods:{
			handleCityClick(city){
				// this.$store.dispatch('changeCity',city)
				
				// this.$store.commit('changeCity',city)
				this.changeCity(city)
				
				this.$router.push('/')
			},
			...mapMutations(['changeCity']) //vuex提供的方法，this.$store.commit->...mapMutations(['changeCity'])
		},
		computed:{
			...mapState(['city'])
		}
	}
</script>

<style lang="stylus" scoped>
	@import '~@styles/varibles.styl'
	.border-topbottom
		&:before
			border-color :#ccc
		&:after
			border-color :#ccc
	.border-bottom
		&:before
			border-color :#ccc
	.list
		overflow :hidden
		position :absolute
		top :1.58rem
		left :0
		right :0
		bottom :0
		.title
			line-height :.54rem
			background :#eee
			padding-left .2rem
			color: #666
			font-size :.26rem
		.botton-list
			overflow :hidden
			padding :.1rem .6rem .1rem .1rem
			.button-wrapper
				float :left
				width :33.33%
				.button
					margin :.1rem
					padding :.1rem 0
					text-align :center
					border :.02rem solid #ccc
					border-radius :.06rem
		.item-list
			.item
				line-height :.54rem
				color:#666
				padding-left :.2rem
				
</style>
